> +static inline void movdir64b(void *dst, const void *src)> +{> + /* movdir64b [rdx], rax */> + asm volatile(".byte 0x66, 0x0f, 0x38, 0xf8, 0x02"> + : "=m" (*(char *)dst) ^^^^^^^^^^> + : "d" (src), "a" (dst));> +}Probably needs fake 64-byte type, so that compiler knows what is dirty.